Final answer:
Positive reinforcement is specifically designed to increase the occurrence of a particular behavior by adding a desirable stimulus after the behavior. The correct answer is options B.
Step-by-step explanation:
A reward is something given for a special behavior, whereas positive reinforcement is b. something specifically designed to increase the occurrence of a particular behavior.
Positive reinforcement involves the addition of a desirable stimulus after a behavior is exhibited, with the intention to increase the likelihood of that behavior being repeated in the future. For example, if a child cleans their room and receives a toy as a result, the toy acts as a positive reinforcer, increasing the likelihood that the child will clean the room again. This is different from a reward, which might be given for a noteworthy action but doesn't necessarily aim to influence future behavior.